CQD
E314299
CQD was an early maritime distress signal used in wireless telegraphy before the widespread adoption of SOS.
All labels observed (2)
| Label | Occurrences |
|---|---|
| CQD canonical | 2 |
| CQD distress calls | 1 |
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
maritime distress signal
ⓘ
wireless telegraphy signal ⓘ |
| associatedWith | early 20th century maritime radio ⓘ |
| category |
emergency signal
ⓘ
radio signal ⓘ |
| communicationMode | Morse code ⓘ |
| developedFor | wireless telegraphy equipment ⓘ |
| fieldOfUse |
emergency communication
ⓘ
maritime safety ⓘ |
| followedBy | SOS ⓘ |
| hasPurpose |
indicate distress
ⓘ
request immediate assistance ⓘ |
| historicalRole | precursor to standardized SOS distress signal ⓘ |
| introducedBy | Marconi Company ⓘ |
| introducedFor | distress signaling at sea ⓘ |
| medium | radio waves ⓘ |
| notationType | alphabetic code group ⓘ |
| precededBy | no standardized international distress signal ⓘ |
| relatedTo |
Morse code emergency procedures
ⓘ
SOS distress signal ⓘ |
| replacedBy | SOS ⓘ |
| replacedInDomain | international maritime distress signaling ⓘ |
| status | obsolete ⓘ |
| usedBefore | widespread adoption of SOS ⓘ |
| usedBy |
maritime wireless stations
ⓘ
ship radio operators ⓘ |
| usedIn |
maritime communication
ⓘ
wireless telegraphy ⓘ |
| usedOn |
cargo ships
ⓘ
ocean‑going vessels ⓘ passenger ships ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
CQD distress calls